Coltan is the name of the composite mineral coltan tantalite. Coltan is a metal ore containing niobium and tantalum. Coltan mining has an incompatible role in the mining industry, coltan is widely used in the manufacture of high-tech products, such as mobile phones, DVD players, PS2 Games, and so on.
Tin is a soft, malleable, ductile, and highly crystalline silvery-white metal. Tin ore is usually extracted by gravity separation, which is determined by the fact that tin ore has a higher density than symbiotic minerals. However, tin ore is often accompanied by iron oxide minerals such as magnetite and hematite, so it is impossible to completely separate the ore only by the gravity separation method. Therefore, the tin ore extraction method will also use the magnetic process and flotation process methods.